Castelli passo giau jacket is a comfortable and simple castelli have poured a lot of energy into their groundbreaking innovations like the alpha jacket its part of castellis constant striving to make riding faster more fun and more comfortable the castelli passo giau jacket is designed to fit your body and nothing superfluous body mapping to bring the right fabrics to each part of the body windstopper x fast fabric on upper chest and shoulders windstopper x mid fabric on sleeves and lower